Looking for a 460 load

I have a S&W460 has a 5 inch barrel. I want to work up a load for it using 340gr moly coated lead bullets from bear creek supply. There is no load data that I can find for that bullet. Anyone have some or at least something close that will give me a starting point?

__________________Mike

" Real elk guns start with the number 3 or bigger and blow two holes, one in and one out." - My Dad